F - Mech Eng,Light,Heat,Weapons – 04 – C
Patent
F - Mech Eng,Light,Heat,Weapons
04
C
103/83
F04C 2/00 (2006.01) F04C 2/10 (2006.01)
Patent
CA 1048344
HYDRAULIC DEVICE ABSTRACT OF THE DISCLOSURE A hydraulic device of the type in which an internally toothed first gear and an externally toothed second gear eccentrically located within said first gear are supported for relative rotary and orbital movement. The gear teeth of the first and second gears define pockets or chambers which expand from a minimum volume to a maximum and again contract to said minimum volume upon relative rotational and orbital movement thereof. A commutation valve arrangement in synchronism with said relative rotary and orbital movement connects the expanding pockets with one side of a fluid pressure system and connects the contracting pockets with the other side of the fluid pressure system. The commutation valve arrangement directs fluid to and from said pockets from one axial side thereof, and an additional valve arrangement is provided for directing fluid into the pockets from the other axial side thereof, the additional valve arrangement being responsive to the fluid pressure in the pockets.
243776
Trw Inc.
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